class Fu
{
    public void show(){
        System.out.println("Show Fu");
    }
}
class Zi extends Fu{

    public  void show(){
        System.out.println("Show Zi");
    }

    public  void method(){
        System.out.println("method Zi");
    }

}
public class ZiDemo {
    public static void main(String[] args) {
       Fu f = new Zi();
        f.show();
      Zi z = (Zi) f;
      z.show();
      z.method();



    }
}

